A-LevelPhysicsElectricityMay/June 2017Paper 1 Q341 Mark
Two wires have the same length and the same resistance. Wire X is made of a metal of resistivity 1.7 × 10⁻⁸ Ωm and wire Y is made of a metal of resistivity 5.6 × 10⁻⁸ Ωm. The diameter of wire X is 0.315 mm. What is the diameter of wire Y?
A0.17 mm
B0.33 mm
C0.57 mm
D1.0 mm
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The correct answer is C. This question tests the candidate's understanding of electricity within the Physicssyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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